My beta test group and I have searched through the book and erratta, and cannot find anything governing how one learns languages, what languages are available, or anything else related to language besides one talent (on the Outlaw tree) "Speaks Binary", which actually only gives you a bonus to communicate with NPC droids (though not PC droids).
In our group, I play a droid, and I wanted protocol droid programming… but couldn't find anything to get one up to C-3PO's many forms of communication.
Finding nothing in the books, we patched-together a home-brew system that works well enough, though it could still be expanded (we used language lists from other online Star Wars sources, or prior versions of Star Wars RPGs):
STARTING: everyone gets Basic and their racial/planetary language, as appropriate.
INTELLECT: each character can take a number of additional languages equal to their Intellect rating.
XP: purchasing additional languages costs 5 XP each.
This didn't get into issues like wookies, who might understand many languages but (historically) have been unable to speak them. Nor does it look at, as one of our players mentioned, "getting the Rosetta Stone software upgrade" for my droid. Even the Cybernetic Brain Implant only gives a +1 to Intelligence (sic), which doesn't help us with the language issue.
Has anyone else come up with a home-brew system that has worked?